diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7d5c56d..7f1f4b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,7 +104,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - runner: macos-13
+          - runner: macos-15-intel
             architecture: x86_64
           - runner: macos-14
             architecture: aarch64
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 14ae7e2..8d5220a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,7 +24,7 @@ jobs:
             resource-directory: linux-x86_64
             library-name: libpbivnorm.so
             platform: linux
-          - runner: macos-13
+          - runner: macos-15-intel
             resource-directory: macos-x86_64
             library-name: libpbivnorm.dylib
             platform: macos